Tetrahedron Letters p. 3927 - 3930 (1994)
Update date:2022-08-02
Topics:
Streith, Jacques
Boiron, Arnaud
Sifferlen, Thierry
Strehler, Christiane
Tschamber, Theophile
A pronounced asymmetric induction (d.e. = 95%) was observed during methylation of pyridinium salt 7 with MeMgI which led ultimately to (2R) 2-methyl-2,3-dihydro-4-pyridone 9. This result is best explained by assuming chelate-control during the asymmetric alkylation step.
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